Here are a couple more of the Pennsylvania-class. First we have the USS West Virginia (ACR-5), showing her outfit as a fleet-flagship, US Asiatic Fleet (Formerly 4th Cruiser Division, Atlantic Fleet), flying the (temporary) four-star flag of Acting Adm. Willard H. Brownson, 1905-07. Besides the obvious differences that she shared with the California, Maryland and South Dakota, with regards to her sisters, Pennsylvania and Colorado, she now sports a prominent aft flying bridge with a "cabin" at the aft end. The "cabin" was a combined admiral's plotting-chart house and radio station, and she has four Marconi transmitters on either tip of her fore- and aft bridge wings.
...and here's the USS Colorado (ACR-7) as a close comparison of the differences between Belleville-equipped ships and Niclausse-boilered ones... a few significant differences can be noted between the Colorado and Pennsylvania, such as the position of her forward top cowlings and, most obviously in her boat complement.
The Free State Cruiser, USS Maryland (ACR-8) was unique among the Big Ten in not having the shield with the Stars and Stripes as part of her bow scroll. Instead she displayed proudly her home state's coat of arms. Other than that she was very similar to the WeVee.